Unit 4 My Favourite Subject 单元语法讲练and but because 的用法 2025-2026学年人教版（2024）七年级英语上册

Unit 4 My Favourite Subject 单元语法讲练 and, but 和 because 的用法 1. and (和，并且) · 功能：表示并列、递进或添加的关系，连接两个相似或相关的成分。 · 含义： “和”、“并且”、“而且”。它把事物加起来，不产生转折或因果。 · 例句： · I like apples and bananas. (连接两个名词) 我喜欢苹果和香蕉。 · He is tall and smart. (连接两个形容词) 他很高并且很聪明。 · She opened the door and walked in. (连接两个动词短语) 她打开门并且走了进去。 2. but (但是，然而) · 功能：表示转折或对比的关系，连接两个意思相反或相对的成分。 · 含义： “但是”、“然而”。它引出的是一个与前面内容相反或意想不到的情况。 · 例句： · He is rich, but he is not happy. (前后情感对比) 他很有钱，但是他并不快乐。 · I want to go to the party, but I have to study. (愿望与现实的对比) 我想去派对，但是我必须学习。 · The room is small but comfortable. (连接两个形容词，表示转折) 房间很小但是很舒适。 3. because (因为) · 功能：表示因果关系，用来引出原因或理由。 · 含义： “因为”。它回答的是“为什么”这个问题。 · 结构： 结果 + because + 原因 · 例句： · I stayed at home because it was raining. (下雨是呆在家里的原因) 我呆在家里因为下雨了。 · She was happy because she got a good grade. (好成绩是高兴的原因) 她很开心因为她取得了好成绩。 · Because he was ill, he didn't go to school. (生病是没去上学的原因) 因为他病了，所以他没有去上学。 【重要区别】because vs. so (因为 vs. 所以) · 中文里常说“因为...所以...”，但在英语里，because 和 so 不能在同一句话中连用！它们就像水管的两个阀门，只能打开一个。 · 错误: Because it was raining, so I stayed at home. · 正确: Because it was raining, I stayed at home. (只用 because) · 正确: It was raining, so I stayed at home. (只用 so) 巩固练习题 一、单项选择 1. I like English, ________ I find it a little difficult. A. and B. but C. because 2. My sister can play the piano ________ the guitar very well. A. but B. because C. and 3. We didn't go for a picnic ________ the weather was bad. A. so B. because C. but 4. He is very tired, ________ he worked all night. A. because B. so C. but 5. The story is short ________ interesting. A. but B. because C. and 6. I want to buy a new bike, ________ I don't have enough money. A. and B. because C. but 7. She went to the library ________ she needed to return some books. A. but B. because C. and 8. I called Tom, ________ he wasn't at home. A. and B. because C. but 9. I got up late this morning, ________ I was late for school. A. because B. so C. but 10. I like this shirt, ________ it's too expensive for me. A. and B. but C. because 二、用 and, but 或 because 填空 11. I finished my homework ________ then I watched TV. 12. He didn't pass the exam ________ he didn't study hard. 13. Is this bag yours ________ mine? 14. It's raining outside, ________ we can play inside. 15. I'd love to go to the cinema, ________ I'm busy tonight. 16. She can't drive, ________ she is too young. 17. The movie was long ________ boring. 18. I like swimming ________ my brother prefers playing basketball. 19. We were hungry ________ we ordered a pizza. 20. I need to go to the supermarket ________ we need some milk and bread. 三、改错题 (每句中有一个错误，请改正) 21. I didn't go to school because I was ill so. _______________ 22. Although it was cold, but he went out without a coat. _______________ 23. She is smart, because she is hard-working. _______________ 24. He bought a pen, a book, because a ruler. _______________ 25. I was tired, because I went to bed early. _______________ 四、根据中文提示完成句子 26. 我很饿，所以我吃了一个三明治。 I was hungry, ________ I ate a sandwich. 27. 他努力学习是因为他想通过考试。 He studies hard ________ he wants to pass the exam. 28. 这件外套很旧但是很暖和。 This coat is old ________ it is warm. 29. 我喜欢猫和狗。 I like cats ________ dogs. 30. 因为明天要下雨，所以我们待在家里吧。 ________ it will rain tomorrow, let's stay at home. 练习题答案与解析 一、单项选择 1. B (前后句意转折：喜欢英语，但是觉得难) 2. C (并列关系：会弹钢琴和吉他) 3. B (引出没去野餐的原因：因为天气不好) 4. A (引出他累的原因：因为他工作了一整晚) 5. C (并列关系：故事短并且有趣) 6. C (前后句意转折：想买新车，但是没钱) 7. B (引出她去图书馆的原因：因为她需要还书) 8. C (前后句意转折：给Tom打了电话，但是他不在家) 9. B (前后是因果关系：起床晚是原因，迟到是结果，用so连接表“所以”) 10. B (前后句意转折：喜欢这件衬衫，但是太贵) 二、用 and, but 或 because 填空 11. and (表示动作的先后顺序：做完作业然后看电视) 12. because (引出考试没通过的原因：因为不努力) 13. or (表示选择：你的还是我的？ 注意：此题考查or的用法，提醒学生注意语境) 14. but (前后转折：外面下雨，但是我们可以在里面玩) 15. but (前后转折：想去看电影，但是今晚很忙) 16. because (引出不能开车的原因：因为她太小) 17. and (并列关系，通常贬义并列用and：电影又长又无聊) 18. but (对比两个人的不同喜好：我喜欢...但是我弟弟更喜欢...) 19. so (前后因果关系：饿了是原因，点披萨是结果，用so表“所以”) 20. because (引出去超市的原因：因为我们需要牛奶和面包) 三、改错题 21. I didn't go to school because I was ill. 或 I was ill, so I didn't go to school. * 解析：because 和 so 不能连用。 22. Although it was cold, he went out without a coat. * 解析：Although 和 but 不能连用。 23. She is smart and she is hard-working. * 解析：聪明和努力是并列关系，不是因果关系。应改为 and。 24. He bought a pen, a book, and a ruler. * 解析：并列列举多个物品，最后两个之间用 and 连接。 25. I was tired, so I went to bed early. * 解析：累了是早睡的原因，但because不能放在两个分句中间且用逗号隔开。应改用 so 来连接结果。 四、根据中文提示完成句子 26. so 27. because 28. but 29. and 30. Because 学科网（北京）股份有限公司 $$